6WFL

Camphor soaked P450cam D251E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.218 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Proton Relay Network in the Bacterial P450s: CYP101A1 and CYP101D1.

Amaya, J.A.Batabyal, D.Poulos, T.L.

(2020) Biochemistry 59: 2896-2902

  • DOI: https://doi.org/10.1021/acs.biochem.0c00329
  • Primary Citation of Related Structures:  
    6WE6, 6WFL, 6WGW

  • PubMed Abstract: 

    Cytochrome P450s are among nature's most powerful catalysts. Their ability to activate molecular dioxygen to form high-valent ferryl intermediates (Compounds I and II) enables a wide array of chemistries ranging from simple epoxidations to more complicated C-H bond oxidations. Oxygen activation is achieved by reduction of the ferrous dioxygen complex, which requires the transfer of an electron from a redox partner and subsequent double protonation to yield a water molecule and a ferryl porphyrin π-cation radical (Compound I). Previous studies of the CYP101 family of cytochrome P450s demonstrated the importance of the conserved active site Asp25X residue in this protonation event, although its precise role is yet to be unraveled. To further explore the origin of protons in oxygen activation, we analyzed the effects of an Asp to Glu mutation at the 25X position in P450cam and in CYP101D1. This mutation inactivates P450cam but not CYP101D1. A series of mutagenic, crystallographic, kinetic, and molecular dynamics studies indicate that this mutation locks P450cam into a closed, inactive conformation. In CYP101D1, the D259E mutant changes the rate-limiting step to reduction of the P450-oxy complex, thus opening a window into the critical proton-coupled electron transfer step in P450 catalysis.


  • Organizational Affiliation

    Departments of Molecular Biology and Biochemistry, Pharmaceutical Sciences, and Chemistry, University of California, Irvine, California 92697-3900, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Camphor 5-monooxygenase415Pseudomonas putidaMutation(s): 1 
Gene Names: camCcyp101
EC: 1.14.15.1
UniProt
Find proteins for P00183 (Pseudomonas putida)
Explore P00183 
Go to UniProtKB:  P00183
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00183
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.218 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.324α = 90
b = 64.039β = 90
c = 105.505γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM131920

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-08
    Type: Initial release
  • Version 1.1: 2020-08-26
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Database references, Refinement description